August 1992: In a blow to Trojan's 1,200-plus workers, PGE tells plant managers it will phase out Trojan by 1996 to reduce cost uncertainties. The plant had been scheduled to run through 2011.

Nov. 9, 1992: Less than a week after surviving an election ballot measure to close the plant, Trojan shuts down to deal with a steam-generator problem.

January 1993: PGE announces Trojan will not reopen, removes all spent fuel from the reactor and places it in the spent-fuel pool.

August 1999: Trojan's 895,000-pound reactor vessel barged for burial at Hanford Nuclear Reservation, 270 miles upstream on the Columbia River.

September 2003: Workers complete transfer of Trojan's spent fuel from the original spent-fuel pool to canisters inserted into air-cooled concrete casks. Known as the Independent Spent Fuel Storage Installation, this dry-cask system is expected to hold Trojan's spent fuel until whenever a federal repository is ready.

April/May 2005: The state of Oregon and the U.S. Nuclear Regulatory Commission determine that removal of radioactivity from Trojan is complete under decommissioning requirements. Under a separate license, Trojan's highly radioactive spent fuel rods remain in air-cooled concrete casks on site pending opening of a federal repository.

May 21, 2006: Cooling tower imploded as part of Trojan's decommissioning

December 2008: Expected finish of dismantling and demolition of Trojan's dome-topped containment building.